/*
 * Copyright 2017 StreamSets Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.streamsets.pipeline.stage.processor.fieldtypeconverter;

import com.streamsets.pipeline.api.Config;
import com.streamsets.pipeline.api.StageException;
import com.streamsets.pipeline.api.StageUpgrader;
import com.streamsets.pipeline.api.impl.Utils;
import com.streamsets.pipeline.config.ZonedDateTimeFormat;

import java.util.LinkedHashMap;
import java.util.List;

public class FieldTypeConverterProcessorUpgrader implements StageUpgrader {

  @Override
  public List<Config> upgrade (
      String library,
      String stageName,
      String stageInstance,
      int fromVersion,
      int toVersion,
      List<Config> configs
  ) throws StageException {
    switch(fromVersion) {
      case 1:
        upgradeV1ToV2(configs);
        break;
      default:
        throw new IllegalStateException(Utils.format("Unexpected fromVersion {}", fromVersion));
    }
    return configs;
  }

  @SuppressWarnings("unchecked")
  private void upgradeV1ToV2(List<Config> configs) {
    configs.stream().filter(config -> config.getName().equals("fieldTypeConverterConfigs") ||
                                          config.getName().equals("wholeTypeConverterConfigs"))
        .forEach(config -> {
          List<LinkedHashMap<String, Object>> configList = (List<LinkedHashMap<String, Object>>) config.getValue();
          configList.forEach(configMap -> {
            configMap.put("zonedDateTimeFormat", ZonedDateTimeFormat.ISO_ZONED_DATE_TIME);
            configMap.put("otherZonedDateTimeFormat", "");
          });
        });
  }
}
